Draytek 3300

Assuming you are using 1 WAN connection only with multiple Public Addresses (Allocated to you by your ISP as you mentioned in your previous Post).
If you have a Block of Public addresses, you can specify a 2nd Subnet in Lan Settings, Assign ONE Public IP from that POOL with the correct subnet mask and then assign the remainder of your public addresses to your Servers/Machines behind your 3300.
3300 Will route them too and would know and serve requests for them as well.
If you want to just create port mappings , you can put that server in the DMZ option, but because you have public ip pool , I would say to specify the 2nd subnet option.
You can specify the 2nd Public Subnet Per WAN Port of 3300, For e.g. If you are connected via WAN1 you can go under Network Menu > LAN , then click the IP routing TAB, Enable WAN 1 and type ONE IP Address and the correct subnet mask from that POOL of allocated IP Address. You can then specify any Public IP from that pool with that subnet mask to any machine behind 3300 and it will work !!

3300-Lan2nd-Subnet.jpg

I an't seem to get it to work. I have given the WAN 1 interface my last useable address in the pool in \Network - WAN - WAN1 - Fast Ethernet\ip address assignment method, and also clicked IP alias and specified all my useable addresses on the WAN interface. Thanks ok and works fine with regards to internet access. I then assigned the first useable public address to the field you said in the above pic, and I also set a NAT route up to my LAN host in the NAT settings but it still will not work

The IP Address you assign in IP Routing don't get NAT'd
So, you either specify in WAN IP Alias and leave the 2nd SUBNET (IP Routing option off) or enable IP Routing and then do it.

I will look into it later, but the pool you have should be only specified in IP Routing
I am not sure where you are assigning your IP Addresses,
please take scrshots and save it in a pdf file n attach it here.

I was trying to assign my public IP's in the NAT table? Is this not right. Not quite sure what you need but have attached the below.
300LANIPROUTE.bmp
3300WAN1.bmp

Please provide your ip details
the block of ip from your provider with the subnet mask
if you don't specify the ip for your WAN1 ; do you get a dynamic ip from your ISP ?
disable all port forwarding/open port or one to one nat host enteries
just specify the 2nd subnet in your IP routing section of WAN 1
 

OK I've got working what I wanted using the port forwarding section, I still have my 2nd subnet disabled on the Lan\ip routing though? I was using Nat\address mapping to try and get my inbound translation to work bu couldn't do it hat way. So i used port re-direction and that worked? Can I do a one-to-one Nat using the 3300 as I thought thats what the address mapping section was for?

Yes I do get a DHCP address from my ISP if I don't specify one in WAN1 PPPoE settings

I was wondering if someone can help me out with a similar issue.
I use to use a vigor 2800 router before i got a a draytek v3300 router.
I have two broadband lines bonded together with sharedband. With the vigor 2800v i use to use open ports to director certain ports to certain pc's within the company network from outside. I can not seem to get this to work on the V3300.

Any help would be appreicated.

Martin